The hex color #812fc3 is a dark color. The web-safe version is Hex
#9933CC. A complementary color is
#7ED03C. The grayscale version is
#7C7C7C. A 20% lighter version of the original color is
#B462F6, and Hex
#4E0090 is the 20% darker color. If the color is saturated by 10%, you get
#8227CA. If the color is desaturated by 10%, the color
#8037BC is obtained.